Furnace attachment.



No. 864,666. PATENTED AUG. 27, 1907'. J. R. 1601.666 R. G. MOSER.

FURNACBATTAGHMBNT.

APPLICATION FILED MAY 23, 1'906.

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No. 864,666.. PATENTED AUG. 27, 1907.

J. R. AMOLER R. G. MOSER. PURNACE ATTACHMENT.

APPLICATION FILED MAY 23,1906- 2 SHBETS-SHEET 2.

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JESSE R. MOLER AND RALPH G. MOSER, OF DENVER, COLORADO.

FURNACE ATTACHMENT.

Specification ofLetters Patent.

Patented Aug. 27, 1907.

Application filed May 23,1906. Serial No. 818,324.

To all whom L lmay concern:

Be it known that we, JESSE R. MoLEE and RALPH G. MOSER, citizens of the United States, and residents of Denver, in the county of Denver and State of Colorado, have made certain new and useful Improvements in Furnace Attachments, of which the following is a specification.

Our invention relates to improvements in furnaces and has for its object prevention of smoke when the furnace is charged with fuel by admitting air and steam into the fire box.

Our invention consists in certain novel features of construction, arrangement and combination of parts as will be hereinafter fully described and pointed out in the claims, reference being had to the accompanying drawing, in which Figure 1 is a front view of a lfurnace with our attachments showing the parts when not in operation. Fig. 2 is a horizontal section taken on line 2-2 of Fig. l. Fig. 3 is a front view of the furnace with the parts of our improvement in operative position. Fig. 4 is a section online 4 4 of Fig. 3.

In the drawing is represented a furnace A which may be of any suitable typo having the fire door B and the ash pit door O. Above the fire door a horizontal row of holes D is made in the front fire wall and attached to the outer face of the front wall is a box E, the front wall of which is pierced with the vertical slots or openings E at suitable intervals corresponding in number and position to the holes D. A slide or damper F fits within the box E against the front wall thereof and has a series of slots F corresponding to those E of box E,

A steam pipe G extending from the steam space oi the boiler is located at one side of the furnace and has a horizontal extension G l which extends into the box E and has at suitable intervals the jet tubes g which extend through the holes D in the front wall of the furnace and into the fire box thereof, said steam pipe G being located back of the slide F as shown in Fig. 2. Located to one side of the furnace (preferably the door hinge side) is a vertical cylinder H in which slides a piston H which is secured at the lower end of rod H2 which extends upwardly through the upper head of the cylinder and carries near its upper end a weight H3. ln the lower end of the cylinder H is fitted a pipe I which is fitted at its lower end into a valve casing J in which is fitted a turning plug J. Extending horizontally from this valve casing to the right and left are the branch pipes K and L, the pipe K having a downward bend and a globe valve K therein. The pipe L extends to the leftand is provided with an elbow connecting it to a vertical pipe L which is connected with a suitable water supply, and is provided with. a globe valve L2 to control the flow of water from said supply. The turning plug J which is provided with a two-way passage has an extension at its inner end to which is rigidly attached one end of bar M, the other end of said bar being pivotally connected to one end of a rod M universally joined to the fire door adjacent to its hinged end.

Movably engaging the piston rod H2 at a suitable point above the upper cylinder head, is a lever N which is pivoted near its opposite end to the iront wall oi the furnace. This end of the lever N has a head N having an inverted V-shaped notch N2 which fits over a pin F2 on the extension F3 ofthe slide F and works on it with a cam action. The other end of slide F has an extension F* to which is pivotally connected one end of a strap bar F5, the other end of bar F5 being pivotally connected to the end of a lever FG rigidly secured to the valve stem of the valve O which is fitted in steam pipe G and controls the admission ot steam to the horizontal pipe G. The strap bar F5 is provided with a series of holes g by means of which the point of attachment of lever F may be varied and thus the quantity of steam admitted to pipe G be regulated. v

When the iire door B is opened to charge the furnace, the rod M will be carried to the left and swing the lever M to the left turning plug J so that water from the source of supply will l'low into the cylinder H and force piston H and piston rod H2 upwardly. As the piston rod is connected to the slide or damper F by the lever N, said slide will be drawn to the left uncovering the holes D cut through the front of the fire box and also uncovering thelopenings E in the box E, said movement of the damper F establishing communication between the holes D and the openings E to admit air draft into the furnace. This movement also, through the valve F5 and lever F, opens the valve O in the steam pipe and admits steam to the pipe G and through the jet nozzles g through the draft holes D into the furnace. The admission of the steam in jets causes a' forced suction draft of air into the fire box.

When the le door is closed, the water supply is cut off and the two-way valve J permits the water in the cylinder H to drain off through cock K and the weight H3 forces the piston and rod downwardly, and through the movements of their connections with the slide or damper F closes the draft holes in the box E and at the same time shuts off the supply of steam, the time for this operation being adjusted by the water cock K placed on the exhaust pipes. In this way, the fireman can adjust the device so as to give that amount of air and steam necessary to completely consume the free carbon. This upper current of air and steam which commingles with the lower current coming through the grate thereby prevents the escape of free carbon. Coincident with the prevention of the escape of free carbon, the consumption of the additional gases which are also retained in the fire box increase the eiiiciency of the coal, thereby lessening its consumption in relation to the units of heat generated.

It will be noticed that by the construction shown that the air and steam are injected into the furnace through the same opening and at the same time, and that also that this admission of air and steam through the same opening produces a orced draft at the time air is most needed in the furnace. Furthermore, the air is heated by its Contact with the steam and is thoroughly mixed with the combustible gases in the furnace before they are cooled by contact with the boiler. Being thus mixed with the combustible gases which require air to make a perfect combustion, a moi-e periect combustion results. i

As the steam jets do not enter the furnace proper', or re box, but are rather in the wall, being in the center of a larger hole through which the air and steam enter the furnace together7 the velocity oi the steam causesaforced draft oi air to enter through the larger opening. The amount o air and steam desired to make a perfect combustion can be independently regulated by the adjustment of the various parts of the device. The cylinder H acts both as a fluid pressure motor and as a dashpot, and the single two-way cock J/ acts as an inlet'and an outlet.

By attaching our mechanism to the boiler iront instead o to the door, it is not subject to jar and strain when the door is opened and closed.

Oui' device becomes operative as soon as the re door is opened, and may be cut out of operation when so desired.

-The lugs or projections h on the rod I-I/ engage the free end of lever N to cause it to swing on its pivot, when said rod moves up or down.

We claim:

1. In a boiler' furnace having a pivoted lire door, the front wall of said furnace having a series of openings therethrough, a series of steam jets projecting into said openings, a boxing disposed over said openings and having a corresponding series of openings, a damper plate slidably mounted in said boxing and also provided with a corresponding series of openings, a cylidner carr'ying a piston rod projecting from the said cylinder', said piston rod oper atively connected with one end of the slidable damper plate, means connecting the opposite end of said damper plate with the valve of a steam supply, said cylinder havingl a connection with a liquid supply pipe a valve in said pipe and controlling the saine, and means connecting the fire door with said valve, whereby opening and closing the lire door will admit and discharge liquid to and from the cylinder' to move the piston and thereby cause the admis4 sion of a forced mixed draft of air and steam to the charge ot the furnace and shut off the same.

2. In a boiler' furnace, the front wall of which is pierced by a series of openings, a damper' plate slidably disposed over said openings and having a corresponding ser'ies of openings therethrough, a steam pipe disposed along the front wall of the furnace and provided with jets projecting into said openings in the front wall, said steam pipe con nected at one end to the steam space of the furnace, a valve in said steam pipe operatively connected to one end ot' the damper plate, a cylinder' located adjacent to the Opposite end of the damper plate, a piston in said cylinder, a lever connecting said piston with the damper plate,

4a'liquid supply pipe connected with the lower end of said cylinder, a two-way cock in said liquid supply pipe, a iire door pivotally hung to the front wall of the furnace, and connections between said door and the two-way cock whereby opening of the door-.will operate said valve to admit liquid below the piston and raise the same to cause a sliding movement of the damper plate to open the steam valve and also uncover the openings in the front wall of the furnace to permit a forced mixed draft of air and steam to be delivered to the charge of the furnace.

2l. ln a boiler furnace the front wall of which is pierced by a series of openings, a boxing disposed over said openings said boxing beingl provided with a corresponding se ries of openings a damper plate provided with a corre sponding series of openings, said damper plate slidably mounted in said boxing' a steam pipe within said boxing and connected at one end to the steam space of the furnace, a valve in said steam pipe operatively connected to one end of the damper, a cylinder located adjacent tothe opposite end of the damper, a piston in said cylinder', a lever' connectingl said piston with the damper, a liquid supply pipe connected with the lower end of said cylinder, a twovway cock in said liquid supply pipe, a fire door pivotally hung to the front wall of the furnace, and connections between said door and the two-way cock whereby opening' of the door' will operate said valve to admit liquid below lthe piston and raise the same to cause a sliding motion of the damper to open the steam valve and also the openings in the boxing, permitting a forced mixed draft of air and steam to be delivered to the charge of the fur'- nace.

fl. In a boiler furnace the front wall of which is provided with a horizontal series of openings or holes, a series of steam jet tubes located in said openings, a pipe from which said jet tubes project and connect with the steam space of the furnace, a valve in said pipe, a boxing secured to the front wall of the furnace over the aforesaid openings, said boxing having a corresponding ser'ies of openings, a damper slidably fitted in said boxing in front of said jet tribes and having a corresponding series of openings, a lever connection between one end of said damper and the valve in the steam pipe, a vertical cylinder secured to the face of the furnace adjacent to the opposite end of the damper, a piston and piston rod in said cylinder', a lever' connection between the piston r'od and the adjacent end of the damper, a pipe leading from below the piston to a suitable liquid supply pipe, a two-way cock interposed in the pipe leading from the cylinder' to the liquid supply pipe, a lever' rigidly connected with said two-way cock, a rod pivotally connected at one end to the fr'ee end of said lever', and a tire door hinged to the fr'ont wall of the furnace, and flexibly connected to the rod which is pivotally connected to the liquid valve lever.

JESSE R. MOLER. RALPH G. MOSER.

Witnesses Tiros. E. MCILDUFF, J. K. MoNArrAN. 

